//----------------------------------------------------------------------------
//
// TSDuck - The MPEG Transport Stream Toolkit
// Copyright (c) 2005-2025, Thierry Lelegard
// BSD-2-Clause license, see LICENSE.txt file or https://tsduck.io/license
//
//----------------------------------------------------------------------------

#include "tsCDT.h"
#include "tsBinaryTable.h"
#include "tsTablesDisplay.h"
#include "tsPSIRepository.h"
#include "tsPSIBuffer.h"
#include "tsDuckContext.h"
#include "tsxmlElement.h"

#define MY_XML_NAME u"CDT"
#define MY_CLASS ts::CDT
#define MY_TID ts::TID_CDT
#define MY_PID ts::PID_CDT
#define MY_STD ts::Standards::ISDB

TS_REGISTER_TABLE(MY_CLASS, {MY_TID}, MY_STD, MY_XML_NAME, MY_CLASS::DisplaySection, nullptr, {MY_PID});


//----------------------------------------------------------------------------
// Constructors.
//----------------------------------------------------------------------------

ts::CDT::CDT(uint8_t vers, bool cur) :
    AbstractLongTable(MY_TID, MY_XML_NAME, MY_STD, vers, cur),
    descs(this)
{
}

ts::CDT::CDT(const CDT& other) :
    AbstractLongTable(other),
    download_data_id(other.download_data_id),
    original_network_id(other.original_network_id),
    data_type(other.data_type),
    descs(this, other.descs),
    data_module(other.data_module)
{
}

ts::CDT::CDT(DuckContext& duck, const BinaryTable& table) :
    CDT()
{
    deserialize(duck, table);
}


//----------------------------------------------------------------------------
// Inherited public methods
//----------------------------------------------------------------------------

uint16_t ts::CDT::tableIdExtension() const
{
    return download_data_id;
}

ts::DescriptorList* ts::CDT::topLevelDescriptorList()
{
    return &descs;
}

const ts::DescriptorList* ts::CDT::topLevelDescriptorList() const
{
    return &descs;
}


//----------------------------------------------------------------------------
// Clear the content of the table.
//----------------------------------------------------------------------------

void ts::CDT::clearContent()
{
    download_data_id = 0;
    original_network_id = 0;
    data_type = 0;
    descs.clear();
    data_module.clear();
}


//----------------------------------------------------------------------------
// Deserialization
//----------------------------------------------------------------------------

void ts::CDT::deserializePayload(PSIBuffer& buf, const Section& section)
{
    download_data_id = section.tableIdExtension();
    original_network_id = buf.getUInt16();
    data_type = buf.getUInt8();
    buf.getDescriptorListWithLength(descs);
    buf.getBytesAppend(data_module);
}


//----------------------------------------------------------------------------
// Serialization
//----------------------------------------------------------------------------

void ts::CDT::serializePayload(BinaryTable& table, PSIBuffer& buf) const
{
    // Fixed part, to be repeated on all sections.
    buf.putUInt16(original_network_id);
    buf.putUInt8(data_type);
    buf.pushState();

    // Loop on new sections until all descriptors and data bytes are gone.
    size_t desc_index = 0;
    size_t data_index = 0;
    while (table.sectionCount() == 0 || desc_index < descs.size() || data_index < data_module.size()) {
        desc_index = buf.putPartialDescriptorListWithLength(descs, desc_index);
        data_index += buf.putBytes(data_module, data_index, std::min(data_module.size() - data_index, buf.remainingWriteBytes()));
        addOneSection(table, buf);
    }
}


//----------------------------------------------------------------------------
// A static method to display a CDT section.
//----------------------------------------------------------------------------

void ts::CDT::DisplaySection(TablesDisplay& disp, const ts::Section& section, PSIBuffer& buf, const UString& margin)
{
    disp << margin << UString::Format(u"Download data id: %n", section.tableIdExtension()) << std::endl;
    if (buf.canReadBytes(3)) {
        disp << margin << UString::Format(u"Original network id: %n", buf.getUInt16()) << std::endl;
        disp << margin << UString::Format(u"Data type: %n", buf.getUInt8()) << std::endl;
        DescriptorContext context(disp.duck(), section.tableId(), section.definingStandards(disp.duck().standards()));
        disp.displayDescriptorListWithLength(section, context, true, buf, margin, u"Common descriptors:");
        if (buf.canRead()) {
            disp.displayPrivateData(u"Data module", buf, NPOS, margin);
        }
    }
}


//----------------------------------------------------------------------------
// XML serialization
//----------------------------------------------------------------------------

void ts::CDT::buildXML(DuckContext& duck, xml::Element* root) const
{
    root->setIntAttribute(u"version", _version);
    root->setBoolAttribute(u"current", _is_current);
    root->setIntAttribute(u"download_data_id", download_data_id, true);
    root->setIntAttribute(u"original_network_id", original_network_id, true);
    root->setIntAttribute(u"data_type", data_type, true);
    descs.toXML(duck, root);
    root->addHexaTextChild(u"data_module", data_module, true);
}


//----------------------------------------------------------------------------
// XML deserialization
//----------------------------------------------------------------------------

bool ts::CDT::analyzeXML(DuckContext& duck, const xml::Element* element)
{
    xml::ElementVector xdata;
    return element->getIntAttribute(_version, u"version", false, 0, 0, 31) &&
           element->getBoolAttribute(_is_current, u"current", false, true) &&
           element->getIntAttribute(download_data_id, u"download_data_id", true) &&
           element->getIntAttribute(original_network_id, u"original_network_id", true) &&
           element->getIntAttribute(data_type, u"data_type", true) &&
           descs.fromXML(duck, xdata, element, u"data_module") &&
           element->getHexaTextChild(data_module, u"data_module");
}
